Iamsu!, the 23-year-old producer and rapper with a mop afro and playful laugh, enjoys the challenge of bridging two worlds. Known both for his grounded storytelling and command of West Coast party music's slapping palette, he's a thoughtful introvert and high-energy leader all in one. Along with his crew HBK Gang, he's offering listeners a new brand of positive, pro-individuality rap that might be mistaken for preachy if it weren't so fun.